Year	% of total merchandise exports
1972	71.45007904047375
1973	67.5137748791184
1976	75.64269679194729
1978	80.09490940465919
1979	75.88485921462578
1980	78.20930201905895
1981	81.12390032454458
1982	81.12390031380654
1983	81.12390031641465
1984	81.1239003344508
1985	81.12390031144363
1986	88.59510364222835
1987	83.71413343942484
1988	77.95511496447564
1989	81.84098992770987
1990	80.59319168793586
1991	81.97068018105892
1992	82.53550094044053
1993	83.62007319254221
1994	85.27621624226356
1995	83.17605447232381
1996	84.85979580826175
1997	85.40615327270099
1998	85.7298973132007
1999	86.27799432839758
2000	80.83856181924246
2001	88.59361328795707
2002	84.07479863879324
2003	84.13498244180812
2004	78.523254446151
2005	76.9519319485667
2006	77.19888066603708
2007	77.73775703571249
2008	80.17682028551931
2009	79.95403757282318
2010	79.32996449001098
2011	78.36327380848196
2012	74.69746910643073
2013	75.00866634992754
2014	71.18499394469696
2015	69.17910502498806
2016	64.49979257173307
2017	63.034766749612814
2018	61.49034114379808
2019	61.552571192884706
2020	56.55721590868227